Firefox: open .pdf files with acrordrdc (installed by snap)

I’m trying to open .pdf files in Firefox with acrordrdc installed via snap. I tried:

1. Since acrordrdc file.pdf works it tried using a “wrapper” file:

   #!/bin/bash
   acrordrdc $1
   

2. Editing the acrordrdc.desktop (see https://askubuntu.com/a/1168551/802536).

In the first case (the wrapper solution) acrordrdc opens with an empty window. No file is showed.

In the second case I can select “Acrobat Reader DC” in Firefox but nothing happens when the files is downloaded. Acrobat is not opened.